Annabel has 25 ounces of a 20% boric acid solution which she wishes to dilute to a 10% solution. how much water does she have to add in order to obtain the 10% solution?

Annabel will add 25 ounces of water in 20 % boric solution.

Step-by-step explanation:

Annabel has 25 ounces of a 20% boric acid solution.

She wishes to dilute this solution to prepare a 10% solution.

We have to calculate the amount of water to be added to obtain 10% solution.

Let she adds x ounce of water with the 20% boric acid solution.

So the equation will be

Amount of 20% solution × strength = Amount of 10% solution × strength

25 × = (25 + x) ×

25 × 0.20 = (25 + x)×0.10

5 = 2.5 + 0.10x

5 - 2.5 = 0.1x

2.5 = 0.1x

x =

x = 25 ounces

Therefore, Annabel will add 25 ml of water.

mr. graef told us it is 13 pints

step-by-step explanation:

3-4

step-by-step explanation:

the answer is 3-4 because both 45 and 60 has a multiple of 15.

45/3=15

60/4=15

therefore the odds against selecting a red is 4-3